An international team of researchers has examined the optical and dielectric properties of thin macroscopic films based on single-walled carbon nanotubes and obtained an explanation for the metallic nature of their conductivity using infrared and terahertz spectroscopy.
Topological insulators are new materials with special electronic properties and are of great fundamental and applications-oriented interest. Nevertheless, physicists have wrestled with a ten-year-old puzzle in which the results from the two best methods to probe their electronic states disagree. Researchers now know exactly why.
Researchers have suggested a new solar cell coating that combines features of an electrode and those of a light-trapping structure. The coating enabled them to cut down on reflected light and avoid solar cell overheating, thus increasing its overall efficiency by 20%.